Windshield cleaner



\ Nov. 28, 1944. A. RAPPL WINDSHIELD CLEANER Aaxffo Filed Feb. 2, 1942`travel for the wiper.l

Patented Nov. 28, 1.944`

2,363,621 3 WINDSHIELD CLEANER Y Rappl, Buffalo, N. Y.; assignorw 'friteProducts` Corporation-,Buffaf Applieafi: February 2, 19212,. serial!Nef. @aan a ZGCIams. (Cl.

Thislinventionf relates tofa Windshield cleaner o l of thexuid pressure`typel `wherein theowiper is oscillated` .over `.the `Windshielclsurface.

The

stroke `ofthe wiper isf dependent upon the `speed of motor operationWiththe extent of wiper movement increasingt as the speed; of the motorlincreases; This is due toythe inertia set up in the tast. moving Wiper"`and its driving parts. SllCh overtravel or whipping of the-Wiper at thel end of eachstrokeat high speed is objectionable l because it not onlycauses the `Wiper to` strike against the windshield molding.. on frameand mar theV finish thereof but it also produces a l distracting, noiseincidental, `to ,such striking. Theiobjectgof the present invention istorpro vide `an improved vvindshie1drcleaner` ingvvhich` thel overtravelislcontrolled` in'` a manner to secure a` generallyuniform path and;extent of:

,The invention;rurtrieehasfffor itsobjeta.. tol provide3 avvindshieldcleaner in which theiwiper having aseat liengagod-by a hanger I6 towhich movement is governed'in` accordancev/ith theA speedof operationfor: insuring a more uniform operation.

*Inthe drawing;- o l e .n .`.Eig. 1 isan elevation oftheimprovedwindshield cleaner With` the` cover plate `.of the` valvehousingremoved; l l i l l Fig. 2fis1a1jvertica-l sectional View throughthe valve mechanism showing `the timing or governing, arrangement; Y i

:FigS-is anexplodedlview in perspective of the valve kickeranditsspeedregulated actuator; .l

Eigfl is `a View depicting `the actuator in a` speed responsive positionand atthe` end of its kicker actuatingV stroke,V the kicker beingrpoised substantially onyits dead-centerposition ready forspringactuation;` and'` 'o n Fig.f5isa similar viewlshowing, the actuatordisplaced radially in response to` high motori speed` and. at the startof its kicker` actuating-J movement.V l

` Referring more` the numeral l. designates a Windshield. cleaner.motor. having `an arcuate chamber in which os*-l cillates a piston orvane 2 carried' by they shaftv 3.

As herein depicted both ends of( the shaftextend fromlthe motor'`chamber, `one-end being 'connected to the` Wiper carrying: arm` 4 onrthe outer end of which ismounted the Wiper-blade.- 5,. While theopposite end. projects into thevalve particularly to..` the drawing,l

pressure.` The valve is limited in its movement by alpair` ot legs,oneof which is shown at l0, strandlirig` a1 cushioning stop-` ring" Illlloosely mountedcn-the mounting pin l2. A-kicker I3 having a segmentalhub 3| 4 l isv pivotally mounted onthe-shaft a Within the chamberl, thekicker oneendof asnap spring l1 is hung, the opposite end:` ofthe-spring being; engaged throughl an eye la-in a valve; pressure! plateI9-which bears on `the valve.- atyZ'Il'to urge `the valve lightly towardits'lseat As thepiston moves under the urge ot tt-1eA pressure fluid:thekicker is; gradually movedr` thereby `across the. line of springforce to permita the-spring quickly snappingA the kicker ltoitsoper-ative .position on the `opposite side. This operation. is quitegenerally found in vthe present day WindshieldL cleaner ,andN referredto in PatentNo'.- 2,052,319;41 granted.- on February 25, 1936,

C. Horton:` andfI-Ienry Hueber.

-'o The, kicker-,is connected to the actuating shaft in` a manner to`regulate the moment of kicker` operation; `this 1 regulation being`determinedy througha speed responsive control. 'l vIn thespeci'ficembodimentshownherein the kicker is provided Withapair. of stopshoulders 25 adaptedyto bealternatelyengagedfby algovernor in the form`.ofanlactuator member 26l interposed between thespaced `shoulders 2/5`withk a predeterminedy amount. cfplay. Whenthe actuator 26 engages'Y alrshoulier.. and thereafter carries the; kicker j along with itacrossfadeadcenter position Withv respect `tothe liney of-force of, the springIl, the

. latter...vvi`ll then` quickly, move' the kicker` independently of thea.cttlator 2,6 and' effect a shiftinsA loiftlie` valve toreverse the`pressurediflen- Y `entialeon thej piston., v

` Theaotuator is` o fQ such design and construc-` tionas to advance the.timeon momentfat which the kicker is moved across the dead centerposition When` the motor isl `operating at a fast speedl lcar-vthisapurposeltheyactuatorispro- `chamber or compartment 6 and supportsa-valve- [for oscillatory movement over a valve seat 8` having suitableport `means 9"for `operatively subjecting the. piston to the` requiredoperating vi'dclwithtan activefpartr2-'l'havingtwo` converging "series.of` `face `portions in the form` of steps Whiclare .adapted toselectively engage the'V shoulders 25; ShouldV the `active part at itsgreatest.wdth engage the shouldersi it-Will advancethe time'in thecycle4 ofoperation at Which'l thfakiker` is` moved.. acrossvdead center,orin other Words, it advances the moment at Which the'. springl"l7`becomeseffective.f Iffa narrower I section of the activepartengagesthe shoulders the l functioning. of@ .thewspring will becorrespondingly delayed. Q'Lo eiect` this selective engagement of theactive, part with the shoulders l the actuator is mounted for radialmovement on a shaft carried pin 28. The actuator is provided with a seat29 which normally rests on the shaft 3 under the urge of a coil spring30 which latter is arranged within an opening 3l. The spring is suitablysupported onfa diametral extension of the pin 28 and may be adjustableto regulate its sensitivity of response.

The actuator may be adjusted by any suitable means, preferably in anautomatic manner as will now be described. For this purpose an inertiamember in the form of a weighted disk 32 is rotatably mounted on theshaft, or a reduced extension 3 thereof, and is provided with a'pair ofcam lugs or surfaces 33 which normally engages a pair of lifters orshoes 34 extending from the actuator 2B, the arrangement being such thatthe spring 30 will act to hold both shoes 34 normally engaged with thelugs 33 and thereby establish a yieldable driving connection between theshaft and disk for oscillation'. However, during fast operation of themotor the inertia in the disk v32 will carry through from the precedingstroke into the beginning of the following piston stroke and'advance theforward one of the lugs 33 to exert a oamming tendencyy on its shoe 34in addition to establishing the yieldable driving connection between theshaft active vportion 21 will engage the shoulders 25 to obtain amaximum p-iston stroke. Should the available suction increase inintensity and thereby cause the motor to accelerate to higher speed ofoperation, in which the inertia in the weighted disk 32 overcomes theresistance offered by the spring 30, the actuator will be lifted by thelugs 33 along the pin 28 to effect an earlier operation of the kicker.This advanced operation is therefore determined by a speed controlledmeans Which acts in response to the motor speed for shortening thestroke of the piston sufficiently to compensate for the overtravel ofthe wiper. The result is that the wiper will have a wiper movement atthe higher speed substantially equal to the normal wiping stroke. i

To facilitate the mounting of the actuato-r the latter is formed, with alateral recess 35 in its back face to enable placement of the actuatorover the connecting pin 23 in an interlocking manner after1 rst passingthe shaft through the spring receiving opening 3|. Thereafter theinertia member 32 is placed on the shaft extension A 3 and securedrotatably thereon by a retaining washer 36 and split ring 31.

The construction is of simple form and while the foregoing descriptionhas been given in deand disk for reversingthe rotation of the latter.This camming tendency if sucient to more than counteract the urge ofspring 30, will move the actuator outwardly to dispose a new stepportion 21 in the path of the shoulders 25. Now, at the end of thisstroke, as determined by the shifting of the valve, the Weighted diskwill be carried on by its inertia'while the piston will have startedback in the opposite direction. Consequently, the previouslydriving'shoe 34 will relax and permit the spring to impart inwardmovement tothe actuator before the companion shoe reestablishes drivingcontact with its disk lug 33. However, as soon as the driving relationhas been effected and assuming that the camming tendency is sufficientlto position the actuator outwardly-in its stroke-shortening locationsuch lifting of the actuator will follow. This elevated position of theactuator is secured by tail, it is obvious that the principles hereininvolved are capable of assuming other physical embodiments withoutdeparting from the spirit and scope of the invention claimed.

What is claimed is:

1. A windshield cleaner comprising a fiuid motor having an actuatingshaft, a wiper operatively connected to the shaft for being oscillatedthereby, means operable by the motor for reversing the iiuid pressureapplications to the moving part of the motor, the arrangement being suchthat the Wiper develops a degree of overtravel at the end of each strokewhen operating at a high speed, and means for timingthe reversal of thepressure applications in accordance with the speed of operation of themotor to the inertia of the disk and will be maintained throughout theremainder of the stroke by the friction in the driving engagement of theselected step portion with the shoulder, as depicted in Fig. 5.Therefore, the kicker movement across the dead centery position will beadvanced to effect an earlier shifting .of the valve. From Fig. 4 itwill be observed that the outwardly converging portions constitute aradially tapering active part which is moved centrifugally inresponse toincreased motor speed to shorten the fluid iniparted stroke by advancingthe timing of kicker actuation.

Upon the next stroke of the piston the inertia of the weighted member 32will bring the companion lug into active relation with its associatedshoe and maintain Athe actuator in the time advancingV position. Whilethere is a tendency for the spring 30 to restore the actuator to itsinnermost position where it seats upon the shaft, the interval betweenthe release of one lug and the engagement of the companion lug is sobrief that the actuator practically remains in its time advancingposition until the speed of the motor returns to normal.

From the foregoing it will be observed that when the motor is operating'at the preset normal speed of operation the narrowest part of theshorten'the stroke of the member and thereby prevent an overriding ofthe latter beyond the normal stroke 3. A windshield cleaner comprising auid motor having an actuating shaft, a wiper operatively connected tothe shaft for being oscillated.

thereby and subject to a whipping tendency at the end of each strokeduring high speed oper'` ation, means operable by the motor forreversing the fluid pressure applications to the driving part of themotor, and speed responsive means operable to shorten the stroke of thewiper duringv high speed operation whereby to maintain a substantiallyuniform wiper stroke for the different Wiper speeds.

4. A uid motor comprising an oscillatory shaft,

a valve, an oscillatory kicker operable .to move i the valve from one tothe other of two operative positions, an actuator having partsstraddling the shaft and normally seatingthereon, a pin carried by theshaft and interlocking with the actuator to drive the same with theshaft, said actuator being movable radially along the pin, said kicker lhaving spaced shouldersf between iiivlriclrtlie i ao tuat'or:`isifjadgustable along the: pinf means :resti: iently urging theaetuator'tof its innermost position",` and rotatable speedresponsive`l'l'ieans-` `op eratively connectedfto me actuator-for urging.

tl'ie.l actuator outwardly,theirelationshipbetween i Y the.` actuatorYandthe shtmlol'ersbeing:` suon that the outward movementrfot thelactuatofunder `the `urge of. the` speed responsive meansiwilleifect: an

earlier `operationofthe` kicker;A y i l i 5. A `iiuid motorhavingaxsmembenvmovable back` andfrforthby: fluid pressure,`anloscillatory drive i shaft, an'. `inertia. s member: resilientlyvcon@` i nectedv thereto: to" be' `oscillated :therebyavalve meansoperable: toureverse `the pressure. dilferen'` tial on. the rst member,`'andameansf operableiby theA `inertia member: Wham moving, under its"`own` inertia: against the resilient connection `1forcorrespondinglylchanging the time: of functioningsot thelval-ve Ilneans.` i t tAinflui'd'y moltenhavingA a; membert movable `disposing means ein:accordance` `intlielriotorspeed.I i i in` Af valve' actionner.operatively' reversing :the

iluidrvpressure*differentialllnlgzimotor;'comprising t a valvekickermovablebackr and` forth Abetween two positions, resilient means -Afor:` .moving i the f kicker `i'lrst toene position:` andi then ltol theother position from an intermediate location; meansopa erableliby-themotorfor disposing tlieakiclner suchf :intermedialin@` location;` andspeed `respon-sive o means `operable to advancethe functioning V:of said12.: A` uuid! motoriV ha` ing; a: memberfvmovable 'backand` forth. byufluid,} la driveshalt `oscillatetl thereby, valve means for` reversingthe fluictprese sure.. diiferentlal onsaid memben and i including a.spring actuated `kickermovable back? and forth l across a position ofmaximmn'spring distortion for? being actuated: by itsfspringltooperatesthe i Wvalveimeanasaid: kicker having spacedishoulders,

back: andforthfbyf lluid=,1 a `drivezs'haft oscillated. t

therebyr valve meansfor reversing Ithe: ilui'dspressurei differential;`onrsaidiA member; and speed*` re'-` sponsive means :operableytolladvancethe lfunc: tioningi of said' valve meansto4 shortenthe fluid speedincreases. i i i imparted "Stroker ofwsaidymember `asfthe; motor x'Lu-A- fluidi` motor having a mernberw` movable backnand forth by fluid,adrive shaft oscillated t .3o thereby,;valve means fon reversing the-lluidpres-vsuredifferentialf oni. said member, andvincluding i a springactuated kicker movable back and forth i across a;` position ofY maximumspring. distortion for being actuated` by its' spring to operate i the"valve means, and means; responsive to l the` speed i oi?`oscillationlxof the shaft; toregulate the timeof functioning of saidvalve means to determinetha stroke of said iin-einber. y

8.' A `fluid motor having a member movable back and forth by fluid,adrive Vshaft oscillated thereby, valve means for reversing the fluidpressure differential on saidmember, and including a spring actuatedkicker movable back and forth across a position of maximum springdistortion for being actuated by its spring to operate the valve means,means adjustable to regulate the time of functioning of saidvalve meansto deteri y mine the stroke of said member, and means re` sponsive tothe motor speed `for so adjusting the regulating means.

` 9. A fluidmotor having a member movable back and forth by fluid, adrive shaft oscillated y thereby, valve means for reversing the fluidpresy sure differential on said member, and including a spring actuatedkicker movable back and forth across a position of maximum springdistortion for being actuated by its spring to operate the valve means,`said kicker having spaced shoulders, an actuator having a` convergingseries of face portions selectively engageable with the shoulders,

shaft to `be oscillatcdlL-itherebyfand saidsliit`portions.'constituting:a` driving oonneotionyzbetween the actuator and.the disk and noperating2in'such manner Yat the fend: :of y `each:stroketo` permi't'the disk continuingitsgmovement relativeito theactuator fand :against the urge of said resilientmeans to# canse oneor`the other of said lift' portions to i sofmove :the actuator; into:L suchselective i position for advancing@ the: kicken `actuation during fastmotor 1 operation to :shortem `the travel i ofssaid in'el'nbernv `i t yi i y 13. A fluid nro-tor having a member movable back and forth byfluid, a drive shaft oscillated thereby, valve means for reversing thefluid pressure differential on said member, and including a` springactuated kicker movable back and forth across a position of maximumspring `distortion for being actuated by its spring tooperate the valvemeans, said kicker having spaced shoulders, an actuator havingaconverging series of face portions selectively engageable with theshoulders, said actuator being mounted for movement to selectivelyposition the face portions `for suchengagement, a weighted diskrotatable on the shaft and having a pair of lift portions at oppositesides `of the shaft, a cross pin on the shaft interlocking detachablywith the actuator and on one end of which the actuator is slidableradially,` a spring connecting the opposite end of `the pin tothe lactuator and acting to hold the latter yieldably said actuator beingmounted for movement to se-y lectivelypofsition the face portions forsuch `engagement, and speed responsive means operable to so move theactuator. p y

10.` `A valve action for operatively reversing the fluid pressuredifferential in a motor, comprising a valve kicker movable back andforth between two positions, resiilent means for moving the kickerrst toone position and then tothe other position from a predetermined locationto which it `has been. initially moved by the motor, `and means operablein accordance with anincreaseo in the motor speed to advance the time offunctioningof the kicker; i y

` the pin whereby to selectively positionsaid face i seated on both liftportions in such manner that the inertia of the disk at the endof themotor strokes will cause first one lift portion and thenV the other`tolurge the actuator outwardly along portions for advancing the timeoffunctioning of the kicker. i y

14. A valve action for a `fluid motor `having an oscillatory shaft,"comprising `valve `means for operatively applying fayfluid pressurediilerential` `to the motor,` `a spring actuated kicker. movable backand forth across a position of maximum i i spring distortion for beingactuated by its spring to operate the valve means,` said kicker havingspaced shoulders, an actuator having plural active parts selectivelyengageable with the shoulders to vary the time of function of thevalvemeans,

van,

With Jani increase y and means responsive to thespeed of operation of.the shaft for positioning the actuator to select the active part and'thereby determine the moment of functioning of the valve means. l15.*In a fluid motor |having back and'forth strokes, -a snap valveaction for operatively reversing the pressure differential comprising avalve movable back and forth between two operative positions, resilientmeans operable by a moving part ofthe motor forsovmoving the valve, andstroke regulating means operable in response to the moto-r speed to varythe time of valve actuation and thereby modify the stroke in accordancewith speed'inc'rease. l

16. A shaft carried actuator for asnap actio valve mechanism wherein anoscillatory valve is snapped from one Kto the lother of two operativepositions by a kicker positioned spring, the time ofV functioning of thespring being determined bly the actuator, said actuator having an activepart' with a progressive arrangement 'of kicker actuating face portionsselectively positionable inl response to motor speed to vary the timeof, functioning of the kicker and thereby regulate the stroke of themotor, said actuator having a part for movably mounting the same wherebyit may be adjusted to selectively dispose the face portions foractuating the kicker. i

17. vA shaft. oscillated inertia vmember' for adjfusting the actuator ofa snap action valve mechanism wherein the actuator is adapted to belifted to selectively present one of a plurality of active face portionsto a spring shifting kicker to vary the time of valve actuation,comprising a weighted disk adapted for relative rotary movement on ashaft and having spaced lift portions on opposite sides of the shaftmounting for so lifting the actuator during such relative rotarymovement. l

18. A fluid motor having a chamber and a fluid operablemember therein,anactuating shaft oscillated by the member, ai valve movable back andforth for reversingfthe pressure differential on the member, a kickerfor so' moving the valve and having spaced shoulders, and an actuatoroscillatable `by the shaft and having an active part interposed between`the shoulders for alternate engagement therewith, said part havingvariably effective pio-rtions movable in response t0 changes in speedfor varyingV the time of actuation of the kicker.

19. A uid motor having a chamber and a piston therein, an actuatingshaft oscillated by the piston, a valve movable for reversing thepressure differential on the piston, a valve moving kickerhaving spacedshoulders; anY actuator oscillatable by the shaft and having an activepart said kicker having spaced shoulders, an actuator oscillatable bythe shaft and having an active partl interposed between the shouldersfor alternate engagement therewith, said part having portions adjustable-for selectively determining the time of actuation of the kicker, and aninertia member rotatably supported on the shaft and having a partengageable by the actuator for so adjusting said portions.

ANTON RAPPI'..

